[1259] in linux-net channel archive
Re: Asymmetric TCP/PPP performance (very poor receiving TCP)
daemon@ATHENA.MIT.EDU (Robert L Krawitz)
Fri Oct 27 09:37:47 1995
Date: Wed, 25 Oct 1995 10:02:29 -0400
From: Robert L Krawitz <rlk@tiac.net>
to: linux-net@vger.rutgers.edu
In-reply-to: <199510241418.KAA06787@sunspot.tiac.net> (rlk@tiac.net)
More on this subject: I performed a further test using linux patch
1.3.36 (which is gzipped, and probably completely incompressible). I
grabbed it from tsx-11 (which ran at 2.7 KB/sec), and from my PC put
it back to bloch (which ran at 3.3). Grabbing it back from bloch it
ran at 2.6! I didn't have tcpdump running at the time. Given that
our site has a 56 Kb connection to the internet, it's interesting that
I got slightly better performance getting it over the internet than
getting it from a much more local site. It's also interesting that
the performance degradation with incompressible data is much less than
with fully compressible data. Wonder what that means...
(from tsx-11)
ftp> get patch-1.3.36.gz
200 PORT command successful.
150 Opening BINARY mode data connection for patch-1.3.36.gz (545696 bytes).
226 Transfer complete.
545696 bytes received in 197 secs (2.7 Kbytes/sec)
ftp> quit
221 Goodbye.
(to bloch, on an ethernet attached to the gateway that I run PPP off
of)
% ftp bloch
Connected to bloch.aptinc.com.
220 bloch FTP server (UNIX(r) System V Release 4.0) ready.
331 Password required for rlk.
230 User rlk logged in.
ftp> bin
200 Type set to I.
ftp> put patch-1.3.36.gz
200 PORT command successful.
150 Binary data connection for patch-1.3.36.gz (204.32.98.137,1056).
226 Transfer complete.
545696 bytes sent in 159 secs (3.3 Kbytes/sec)
(back from bloch)
ftp> lcd /tmp
Local directory now /tmp
ftp> get patch-1.3.36.gz
200 PORT command successful.
150 Binary data connection for patch-1.3.36.gz (204.32.98.137,1057) (545696 bytes).
226 Binary Transfer complete.
545696 bytes received in 207 secs (2.6 Kbytes/sec)
ftp> quit
221 Goodbye.
--
Robert Krawitz <rlk@tiac.net> http://www.tiac.net/users/rlk/
Member of the League for Programming Freedom -- mail lpf@uunet.uu.net
Tall Clubs International -- tci-request@aptinc.com or 1-800-521-2512
